Mathematics High School

Select all of the following that are quadratic equations.


1. x2 + 3 x -5 = 0
2. x2 - x = 3 x + 7
3. 5 x - 7 = 0
4. 7 x2 + 14 x = 0
5. x3 - 3 x2 + 1 = 0
6. x - 5 = 9 x + 7

Answers

Answer 1

Answer:

1. x² + 3x - 5 = 0

2. x² - x = 3 x + 7

4. 7x² + 14x = 0

Step-by-step explanation:

A Quadratic equation takes the form;

ax² + bx + c = 0

a, b, c are constants and a cannot be 0.

Options 1 fits this;

x² + 3x - 5 = 0

Option 2 fits this as well;

x² - x = 3 x + 7  

x² -x - 3x - 7 = 0

x² - 4x - 7 = 0

Option 4 fits this as well if c = 0.

7x² + 14x + 0 = 0

Related Questions

find the length of a square whose diagonal is 15cm​

Answers

2a^2 = 225
So a^2 = 225/2

Under a given correspondence two triangles are congruent if the three sides of the one are equal to the three corresponding sides of the other
The above is known as
(a)SSS congruence of two triangles
(b)SAS congruence of two triangles
(c)ASA congruence of two triangles (d)RHS congruence of two right-angled triangles​

Answers

Answer:

(a)SSS congruence of two triangles

Step-by-step explanation:

Congruence is a relationship that expresses the similarity between two triangles. The relationship between two triangles with their three sides being congruent is termed as the side-side-side (SSS) congruence property of the triangles. This implies that the two triangles are similar with respect to their three sides.

In corollary, since the three sides of the two triangles are congruent, then the three angles respectively would be congruent.

pls give an explanation u don't have to... I'll give brainly if right!​

Answers

Answer:

72.9

Step-by-step explanation:

Multiply your first 2 terms

4.5* (-9) = -40.5

multiply this by -1.8

-40.5*-1.8 = 72.9

Answer:

−72.9 / option B

Step-by-step explanation:

(4.5)(-9)(1.8)

Step 1: (4.5) x (-9) = (-40.5)

Step 2: (-40.5) x (1.8) = (-72.9)

5. – X – 3 = 2x – 6
Help

Answers

Hello!

[tex]\large\boxed{x = 1}[/tex]

-x - 3 = 2x - 6

Begin by adding x to both sides:

-x + x - 3 = 2x + x - 6

-3 = 3x - 6

Add 6 to both sides:

-3 + 6 = 3x - 6 + 6

3 = 3x

Divide both sides by 3:

3/3 = 3x/3

x = 1.

a discount of 15% is allowed on an article. If a customer received 600.00 discount. find the actual paid on the article​

Answers

Answer:

Step-by-step explanation:

if 600 represents ........................15%

     x.................................................100%

(600*100)/15=4000

the customer paid

4000-600=3400

What percentage of all students prefer hot dogs?
2.5%
27.5%
30%
45.5%
55%

Answers

27.5% is the answer

For Spring Break, Jenny and her friends are planning a road trip from Houston, Texas, to Los Angeles, California. With almost all of the trip on Interstate 10, the total distance will be 1,740 miles one-way. If they average 70 miles per hour on the trip, to the nearest half hour, how long will it take Jenny and her friends to get there?

Answers

Answer: 24.9 hours

Step-by-step explanation:

They are travelling a total distance of 1,740 miles at a speed of 70 miles per hour. Assuming they do not rest, they will take:

Time = Distance/ Speed

= 1,740/70

= 24.9 hours


PLEASE HELP! 13 POINTS

jacks mom purchased a savings bond for jack. the value of the savings bond increases by 5% each year. one year after it was purchased, the value of the savings bond was $210. find the value of the bond when jacks mom purchased it.

Answers

The value of the bond was $200. Assuming the increase was 5% of the initial value. We can estimate that 210 is 105% of the initial value. Set up the equation 105/100 X 210/i. And you should get 200.

I NEED HELPPP PLEASE!!

A landscaper has two fields to seed. The first field requires 122
tons of seed and the second one will need
104
tons. How much
seed will the landscaper need altogether?

Answers

Answer:

226 tons of seed......

Teri begins walking east at 2 miles per hour at 1:00 pm. If cindy leaves from the same point 30 minutes later walking east at 3 miles per hour, when will she catch teri

Answers

Answer:

One hour after  starting

Step-by-step explanation:

Let Teri walk at a rate of 2 miles per hour in time , t + 0.5, since it is 30 minutes ahead and 30 minutes = 0.5 hours, the distance he moves is d = 2(t + 0.5). Also, since Cindy moves at a rate of 3 miles per hour, and starts at time t, the distance d' she moves is d' = 3t.

Now, when they catch each other, the distance moved is the same.

So, d = d'

2(t + 0.5) = 3t

expanding the brackets, we have

2t + 2 × 0.5 = 3t

2t + 1 = 3t

collecting like terms, we have

3t - 2t = 1

simplifying, we have

t = 1

So, Cindy will catch Teri one hour after starting.

I need you to give me all of the answers on the page (i answered 2 to show how you will be doing it)

When you tell me the answers make it like this: 3:### 4:### or something like that.

Answers

Answer:

3. 72= (x)+(x+1)+(x+2) where x= the smallest number

72=3x+3

-3        -3

69=3x

/3   /3

x=23

x+1=24

x+2=25

smallest is 23

4. 48= (x)+(x+2)+(x+4)

48= 3x+6

-6        -6

42=3x

/3    /3

x=14

x+2=16

x+4=18

smallest is 14

5. all erasers were the same cost

25= 4x+5 (x= cost of erasers)

-5         -5

20=4x

/4   /4

x=5

each cost  $5

6. b= boxes

22= b/2 +7

-7            -7

15=b/2

multiply both sides by 2 to cancel the denominator

30=b

30 boxes originally

7. 40= total

8= left

2= balls given to each

x=number of friends

40= 2x+8

-8         -8

32=2x

/2   /2

x=16

she has 16 friends

8.  12= left

a= total allowance

12= (a/2) +4

-4            -4

8= a/2

multiply both sides by 2 to cancel the denominator

a= $16

she had an allowance of $16

9.  4 (2) = amount that her four children recieved

10=amount she took for herself

x= original

x= 4(2) + 10

x= 8 +10

x=18

she started with 18 candies

10. a= age

244= 400 - 2a

-400 -400

-156= -2a

/-2     /-2

a= 78

they are 78 years old

11. c= comic books

36=  c/2 + 16

-16           -16

20=c/2

multiply both sides by 2 to cancel the denominator

c=40

she started with 40 comic books

12.  b= students in buses

472= 9b + 4

-4             -4

468=9b

/9     /9

b= 52

52 students went in each bus

13. h= hats

17= h/2 +5

-5          -5

12=h/2

multiply both sides by 2 to cancel the denominator

h=24

she had 24 hats on monday

14. p= pies the club made

60= (p+4)/5

multiply both sides by 5 to cancel the denominator

300=p+4

-4         -4

p= 296

the club made 296 pies

Step-by-step explanation:

true or false: The Coordinates (7,10) and (-7,10) belong to the fourth and second quadrants respectively

Answers

Answer:

i think that is false

Step-by-step explanation:

Will give the brainliest to the person who answers the question first and correctly!!

For the data set 4, 5, 10, 11, 15, the mean, x, is 9. What is the standard deviation?

Round to the nearest tenth.

A. 4.1

B. 20.5

C. 16.4

D. 4.5​

Answers

Answer:

D. 4.5​

Step-by-step explanation:

Which statement is true? CLEAR CHECK 0.25 = 14 because 25100 = 14 0.20 = 2010 because 0.20 means 20 tenths 0.23 > 12 because 0.23 = 23 0.4 = 14 because they are on the same place on a number lin

Answers

Answer:

because 25/100 = 1/4

0.20 = 20/100

Step-by-step explanation:

because 25/100 = 1/4

0.20 = 20/100

because 0.20 means 20 tenths 0.23 > 1/2

because 0.23 = 23

0.4 = 1/4

because they are on the same place on a number lin

Can some one please help cause I don't understand it

Answers

C and D
It is what the other person said, but you can still mark them brainliest

Help me solve this problem please

Answers

Correct answer is B not C

Hannah completed 1/2 an hour she had to complete 4 math problems she spent and equal amount on each problem how much of and hour did Hannah spend on each problem

Answers

Answer: 1/8 hours or 7.5 minutes

Step-by-step explanation:

Since Hannah spent 1/2 an hour to complete 4 math problems. We are further told that she spent an equal amount of time on each problem.

The amount of time spent on each problem will be:

= 1/2 ÷ 4

= 1/2 × 1/4

= 1/8 hours

Since 60 minutes = 1 hour

1/8 hours = 1/8 × 60 = 7.5 minutes each.

The container that holds the water for the football team is 1/2 full. After pouring out 3 gallons of water, it is 1/3 full. How many gallons can the container hold?

Answers

Answer:

18 gallons

Step-by-step explanation:

1/6 of container is 3 gallons

so 6/6 is 18 gallons

Hope this helps. Pls give brainliest.

PLEASE HELP MEE I REALLY NEED HELP NOT TRYING TO BE ANNOYING BUT I NEED HELPP!!! Find the vertex of the graph of the quadratic function and determine whether it's an absolute maximum or an absolute minimum: y = x squared + 18x + 83.

options
A)
Vertex: (9,– 2); minimum

B)

Vertex: (9,–2); maximum

C)

Vertex: (–9,2); minimum

D)

Vertex: (–9,2); maximum

Answers

Answer:

try math wa y

Step-by-step explanation:

it will give u the answer to most questions the answer is c

Sophia had 64¢ until she spent 1 quarter. How much money does Sophia have now?

Answers

Answer:

Sophia now has 39 cents.

Step-by-step explanation:

One quarter = 25 cents

Since Sophia had 64 cents until she spent 25 cents (1 quarter).

So we subtract 25 cents from 64 cents.

[tex] \: \: \: 64 \: cents \\ \frac{ - 25 \: cents}{ \: \: \: 39 \: cents} [/tex]

Therefore, Sophia now has 39 cents.

What is the slope of line y = 3

Answers

Answer:

slope = 0

Step-by-step explanation:

Answer:

Slope:  0

Step-by-step explanation:

Slope:  0

y-intercept:  

( 0 , 3 )

Graph the functions on the same coordinate axis.
[f) =x+ 1
lelx) =x- 6x-7
What are the solutions to the system of equations?
Select each corect answer.
O (1, 2)
o (6, 7)
O(-1, 0)
O(-8, - 7)
(8, 9)
2 3 4 6 7 8 9

Answers

Answer:

here you go - (-1,0) and (8,9)

Marco needs to buy some dog food at the nearest store six Pazzo dog food cost $25.50 how much would Michael spend on five bags of dog food

Answers

Step-by-step explanation:

Since 6 Pazzo dog food cost $25.50,

5 Pazzo dog food would cost $25.50 * 5/6 = $21.25.

Hence Michael would spend $21.25.

Answer:

$21.25

Step-by-step explanation: $4.25 for each bag so $4.25 x 5= $21.25

Can someone help me answer these 3 questions please

Answers

Answer:

1,NO

2,Just divide the square rooted number with the numbers that square it.

3,Negative

Answer:

1,no

2,by the same word multiplying and the get square root of a number

3,negative

Will someone help me with this one I'll give 18 points and brainliest
(A)TRUE
(B)FALSE

Answers

Answer:

a true

Step-by-step explanation:

hope this helps please give me brainliest

Determine square of -p+6

Answers

Answer:

-12p+p^2+36

Step by step explanation:

(-p+6)^2 is the square of -p+6

we use the formula

(a+b)^2=2ab+a^2+b^2

(-p+6)^2=-12p+p^2+36

the minus of p disappears

I think you meant to say the SQUARE ROOT.

sqrt{-p + 6}

If you meant to SQUARE THE BIMOMIAL, then the set up is:

(-p + 6)^2

(-p + 6)(-p + 6)

p^2 -12p + 36

4t - 12 + 3 - 5t
Please help

Answers

Answer:

-t-9

Step-by-step explanation:

=-5t+4t-12+3

=-t-9

Answer both there’s a part A and B

Answers

Answer:

6

Step-by-step explanation:

Say 5 of your favorite things and whoever has the most of my favorite stuff gets brainlest

Answers

Answer:

food, video games, sports, naps, music  

Step-by-step explanation:

Type the correct answer in each box. If necessary, use / for the fraction bar(s).
Given: A B || CD

If the coordinates of point A are (8. 0) and the coordinates of point Bare (3. 7), the yintercept of AB is____. If the coordinates of point Dare (5, 5), the equation of line CD is y= __ x+ __?

Answers

Answer:

8,3 y=3x+4

Step-by-step explanation:

The y intercept of line AB is 56/5 and the equation of the line CD is y = -7/5 x + 12.

What is Slope?

Slope of a line is the ratio of the change in y coordinates to the change in the x coordinates of two points given.

Given A(8, 0) and B(3, 7).

Equation of line in slope intercept form is y = mx + c, where m is the slope and c is the y intercept.

Slope of AB = (7 - 0) / (3 - 8) = -7/5

Substituting in the equation,

y = -7/5 x + c

Substituting a point (8, 0) on the equation,

0 = (-7/5 × 8) + c

c = 56 / 5

Given AB parallel to CD.

Slope of parallel lines are equal.

Slope of CD is -7/5.

Equation of the line CD is y = -7/5 x + c.

Substituting (5, 5),

5 = (-7/5 × 5) + c

c = 12

Equation of CD is y = -7/5 x + 12

Hence the equation of line CD is y = -7/5 x + 12.

Learn more about Slope here :

https://brainly.com/question/14511992

#SPJ7

Other Questions
What is likely consequences of introducing an export subsidy paid to domestic producers to protect against foreign producers?A.increase the price of goods and services B.it will rise revenue for the government C.it provides an. incentive for products to be efficient D.it reduces the domestic producers costs of production and this enable to domestic producers to reduce the selling price in order to stay competitive why was it so important for Lincoln to implement martial law Mason loves collecting sea glass from the beach. He recorded the weight of each jar full of sea glass. If he decided to distribute the sea glass equally among the jars, how much would each jar weigh? The cost, y y , for x x pounds of nails can be represented by the equation y=3.20x y = 3.20 x . What is the constant of proportionality of the equation? when and why was save the children established? Explain What does it mean for characters words to interact in dialogue? O A. The characters should speak with accents. O B. Each character has a different opinion O C. The characters should be emotional D. Each character should react to the other In the United States, bank deposits up to a certain amount are insured by the FDIC.True or false Left ventricular mass (LVM), determined from echocardiograms, is an important risk factor for subsequent cardiovascular disease. The researchers are interested in assessing whether LVM changes in children over a 4-year period. To help plan the main study, a pilot study is conducted where echocardiograms are obtained from 10 random children from the Bogalusa Heart Study at baseline and after 4 years of follow-up. The sample mean of LVM change over the 4-year study period is 18.9 g and the sample standard deviation is 26.4 g. For answering the questions (a) and (b) below, assume that the sample variance of LVM change in this pilot study is the true variance of LVM change in the population.(a). If the expected increase in LVM is 10 g, what is the power of such a study if a two-sided test is to be used with = 0.05? (b). Since this is a pilot study, the main question of interest is how many subjects would be needed to detect an increase of 10 g in mean LVM over 4 years using a two-sided test with = 0.05 and power = 80%? Suppose the researchers also want to get an idea of the true population variance 2 of LVM change in children over a 4-year period based on the pilot data. (c). Perform a hypothesis test to assess whether 2 is significantly different from 300. Use both critical-value and p-value methods. (d). Find a 95% confidence interval (CI) of 2 . Is the result consistent with that of (c)? Justify your answer. what material often called a shooting stars as it enters the Earths atmosphere I WILL GIVE YOU BRAINLIEST!!Which physical quantity does not change when a piece of copper is heated? 1.________are our books.2.________is what Seema gave me on my birthday.3.________are your pens.4.IS________ how you should behave?5.I don't trust a word you say,________are mere excuses.6.Both the houses are good but_________one is better than.7._______is what the final picture will look like.8._________place is far off from here, If you have 9.0x10^24 molecules of water, how many moles of water do you have? What is a possible disadvantage of using a smaller contour interval? 1. Create 2 French sentences for each of the following words. CeCetCetteCes2. Write a sentence in French talking about the various modes of transportation (train, subway, plane etc..), for example: Which one do you like best? (you can have more than one) Which one do you use the most? Which one do you wish you had? Which one do you wish you could travel on? Which one is the healthiest? Which one pollutes the most?.......You don't have to stick to those questions. There is a wide variety of things you can talk about. Write at least 5 sentences. 3075677532 yesyeysyeydsyeysys Select the correct answer.Consider these functions:f(x) = x + 1g(x)=1Which polynomial is equivalent to (f.g)(x)?A.2I + 121 + 2OB.oc. 2 + 1OD.2I2 + I HELP !!!!! What is the slope of the line that passes through (2, 12) and (4, 20)? (1 point)A -2B 2C- -4D 4 Jasen is older than his brother Micheal. The sum of their ages is 25. The difference of their ages is 7. How old is each sibling. Complete the proof of the identity by choosing the Rule that justifies each step.(1- cos x) sosecx sin tanTo see a detailed description of a Rule, select the More Information Button to the right of the Rule, Find the value of c so that the polynomial p is divisible by (x+2)